KR20230037155A - Vehicle for an intake manifold - Google Patents

Abstract

The present invention relates to an intake manifold for a vehicle, and is to promote stable vehicle operation by preventing malfunction due to reverse flow of oil and condensate contained in blow-by gas. An intake manifold for a vehicle of the present invention comprises a surge part (100) which provides a space into which blow-by gas flows and has a gas inlet (110) inclined toward an outer upper part at a first inclination angle (θ1); and a backflow prevention part (200) provided inside the gas inlet (110) to prevent the blow-by gas from flowing back into the gas inlet (110) after being introduced through the gas inlet (110).

Description

Vehicle intake manifold {Vehicle for an intake manifold}

The present invention relates to an intake manifold for a vehicle, and more particularly, to prevent backflow of oil or condensate contained in blow-by gas supplied to an intake manifold for supplying a combustion mixture into a cylinder provided in an internal combustion engine. It relates to an intake manifold for a vehicle.

In general, a vehicle engine is provided with one or more cylinders formed by a cylinder head and a cylinder block, and uses kinetic energy generated when a mixture of fuel and air in an appropriate ratio is combusted in each cylinder to drive the vehicle.

The intake manifold functions to uniformly supply the mixture formed in the carburetor to the combustion chamber. The intake manifold includes a plenum chamber for temporarily storing the supplied mixture at one side of the lower part, and a throttle body installed to communicate with one side of the plenum chamber and allowing the mixture passing through the carburetor to flow. and an intake runner for guiding the mixture stored in the plenum chamber to flow into each combustion chamber.

Out of the mixture supplied to each combustion chamber through the intake runner, unburned exhaust gas escaping from the combustion chamber to the crankcase through a gap between the cylinder and the piston during the compression stroke and the expansion stroke is referred to as blow by gas.

After the blow-by gas is discharged from the combustion chamber to the crankcase, it passes through the exhaust passage and head cover of the cylinder block and cylinder head through a PCV (Positive Crankcase Ventilation) system, and is recirculated to the intake manifold through a separate PCV hose.

After the blow-by gas is introduced into the intake manifold, a small amount of oil or condensate contained in the blow-by gas is maintained. In addition, as the high phosphorus amount gradually increased, the flow was reversed at once and moved to the valve installed on the intake manifold, causing a problem of failure.

In addition, the intake manifold may cause an engine malfunction if oil or condensate flows backward from the intake manifold to the cylinder, and may cause component failure if repeated for a long period of time.

Korean Patent Publication No. 10-2018-0137692

This embodiment was made to solve the problems of the prior art as described above, and provides a vehicle intake manifold capable of preventing accumulation of oil and condensate while promoting stable movement of blow-by gas moving to the intake manifold. want to provide

The vehicle intake manifold according to the present embodiment includes a surge part 100 provided with a gas inlet 110 inclined at a first inclination angle θ1 toward an outer upper portion and providing a space into which blow-by gas is introduced; and a backflow prevention unit 200 provided inside the gas inlet 110 to prevent the blow-by gas from flowing back into the gas inlet 110 after being introduced through the gas inlet 110. do.

The serge part 100 includes a first unit serge part 102 having an outer shape with a predetermined size; a second unit surge part 104 fused to a lower surface of the first unit surge part 102; a third unit surge part 106 fused to a lower surface of the second unit surge part 104; A runner part 108 formed to a predetermined size inside the surge part 100 to provide a space into which the blow-by flows, wherein the gas inlet 110 is the second unit surge part 104 is formed in

The gas inlet 110 is inclined downwardly from the second unit surge part 104 toward the third unit surge part 106 .

The second unit surge part 104 looks at the gas inlet 110 at the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 and is inclined upward toward the outer upper part, branching a first extension portion 104b; A second extension portion 104c is horizontally branched from an extended end of the horizontal extension portion 104a and extends to the backflow preventing portion 200 .

The first extension part 104b includes a first through hole 104b1 opened to move the blow-by gas to the first unit surge part 102; A second through hole 104b2 opened to move the blow-by gas to the third unit surge part 106 is formed in the second extension part 104c.

The first through hole 104b1 is opened at an upward slope toward the gas inlet 110 by the first extension part 104b.

The second unit surge part 104 includes a first round part 104d1 extending toward the third unit surge part 106, inclined downward to a predetermined length in the axial direction and inclined upward in the circumferential direction; The first inclined portion 104d2 further includes a third extension portion 104d inclined upward from the extended end of the first round portion 104d1 toward the gas inlet 110 .

The backflow preventing part 200 includes a groove part 210 extending from the second unit surge part 104 toward the third unit surge part 106 to a predetermined depth; The third unit surge part 106 includes a backflow prevention plate 220 protruding to be inserted into the groove 210 .

The groove part 210 extends to a first length L1 in the horizontal direction, extends to a second length L2 in the vertical direction, and extends to a first depth dp1 in the depth direction, and the first length ( L1) is characterized in that it extends relatively longer than the second length (L2).

The groove part 210 includes a first wall part 212 formed at a position facing the front surface of the backflow prevention plate 220; a second wall portion 214 formed at a position facing the rear surface of the backflow prevention plate 220 and extending to a relatively lower height than the first wall portion 212; A third wall portion 216 formed at a position facing the side surface of the backflow prevention plate 220 and connecting the first and second wall portions 212 and 214 is included.

The second wall portion 214 is characterized in that it is located at a position lower than the upper end of the backflow prevention plate 220 .

A drain hole 210a opened toward the third unit surge part 106 is formed in the groove part 210 so that oil or condensed water included in the blow-by gas is drained to the third unit surge part 106.

A drain inclined portion 106a inclined toward the drain hole 210a is formed in the third unit surge part 106 .

The backflow prevention plate 220 is spaced apart from the inner front surface of the groove part 210 by a first distance d1 based on the opening width W of the groove part 210, and the inner rear surface of the groove part 210. The and are spaced apart at a second distance d2, and are positioned in a state in which the side surface of the groove portion 210 is spaced apart at a third distance d3.

The first interval (d1) is characterized in that it is relatively longer than the second interval (d2).

The backflow prevention plate 220 has a first backflow inclined portion 222 having an upper surface inclined downward toward the second wall portion 214 .

The upper left and right sides of the first countercurrent inclined portion 222 are inclined downward toward the center and extend.

The backflow prevention plate 220 further includes a drain groove 224 extending in a vertical direction from a surface facing the first wall portion 212 and the second wall portion 214 .

The present embodiment having the configuration described above can stably induce the movement of the blow-by gas into the intake manifold while minimizing problems caused by reverse flow of oil or condensate.

In the present embodiments, malfunction due to reverse flow can be prevented by changing the structure to drain to the runner even when some oil and condensate accumulate inside the intake manifold.

In the present embodiments, by changing the internal structure of the intake manifold, the inflow and distribution of the blow-by gas can be stably performed, while the movement to the gas inlet due to reverse flow can be minimized.

1 is a perspective view showing an intake manifold according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1;
3 is a cross-sectional view showing a gas inlet and a backflow preventer of an intake manifold according to the present embodiment;
4 to 5 are cross-sectional perspective views of FIG. 3 from different angles;
6 and 7 are diagrams illustrating a backflow prevention unit according to the present embodiment.
8 is a perspective view of a backflow prevention unit according to the present embodiment from another angle;
9 is a longitudinal cross-sectional view of the backflow prevention unit according to the present embodiment.
10 is a cross-sectional view showing another embodiment of the backflow prevention unit according to the present embodiment.
11 is a perspective view illustrating a state in which a backflow preventer is viewed from the outside of a gas inlet according to the present embodiment;

Advantages and features of the present disclosure, and methods of achieving them, will become clear with reference to embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments make the disclosure of the present disclosure complete, and common knowledge in the art to which the present disclosure belongs. It is provided to fully inform the person who has the scope of the disclosure, and the disclosure is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

A component is said to be "connected to" or "coupled to" another component when it is directly connected or coupled to the other component or through another component in between. include all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” another component, it indicates that another component is not intervened. “And/or” includes each and every combination of one or more of the recited items.

Terminology used herein is for describing embodiments and is not intended to limit the present disclosure. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used in the specification, "comprises." and/or "comprising" does not preclude the presence or addition of one or more other elements, steps, operations and/or elements.

For reference, FIG. 1 is a perspective view illustrating an intake manifold according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1 , and FIG. 3 is a gas inlet and reverse flow of the intake manifold according to the present embodiment. It is a cross-sectional view showing the prevention part, and FIGS. 4 to 5 are cross-sectional perspective views of FIG. 3 from different angles.

Referring to FIGS. 1 to 5 , the vehicle intake manifold according to the present embodiment includes a surge pod 100 and an adapter (not shown) below the surge part 100 . The surge part 100 has a rectangular parallelepiped shape in the form of a plate, and has a suction port 112 through which air supplied from a throttle body (not shown) is introduced, and connects the suction port 112 and the surge part 100. The duct to do is integrally formed.

In addition, a valve actuator 130 is installed on the other side of the surge part 100 to operate a valve (not shown) that changes the air flow path inside the surge part 100 according to the operating state of the engine.

The adapter is disposed under the surge part 100, has a lower surface fastened to a cylinder head (not shown), and provides a passage through which air temporarily stored inside the surge part 100 is transferred to the inside of the cylinder. .

The surge part 100 and the adapter are manufactured as separate parts, and when fastened to the cylinder head, only the adapter is first fastened to the cylinder head and then coupled later.

A detailed configuration of the vehicle intake manifold coupled to the adapter will be described in detail. For reference, this embodiment will mainly be described with a configuration for preventing backflow of condensate or oil included in the blow-by gas to the gas inlet 110 to be described later.

In this embodiment, a surge part 100 provided with a gas inlet 110 inclined toward the outer upper part at a first inclination angle θ1 and providing a space into which the blow-by gas is introduced, and the blow-by gas are disposed in the gas inlet 110. In order to prevent backflow into the gas inlet 110 after being introduced through the gas inlet 110, a backflow prevention unit 200 provided inside the gas inlet 110 is included.

The surge part 100 includes a first unit surge part 102 having an external shape with a predetermined size, a second unit surge part 104 fused to the lower surface of the first unit surge part 102, and the first unit surge part 104. The third unit surge part 106 fused to the lower surface of the two-unit surge part 104 and the runner part 108 formed in a predetermined size inside the surge part 100 to provide a space into which the blow-by flows. ). And the gas inlet 110 is formed in the second unit surge part 104 .

Since the first to third unit surge parts 102, 104, and 106 are bonded in close contact with each other by vibration welding, assembly is easy, and workability and work speed can be improved at the same time.

The runner part 108 includes a first runner part 108a formed inside the first unit surge part 102 and a second runner part 108b formed inside the third unit surge part 106. include

The runner part 108 is composed of a total of N runners in which a plurality of runners are arranged in two rows when viewed from above. Here, the number and arrangement of the runners may vary depending on the type of engine.

For example, if the adapter is applied to an inline 4-cylinder engine, 4 runners may be arranged in one row, and if the adapter is applied to a V-type 8-cylinder engine, 4 runners may be arranged in 2 rows.

In this embodiment, after the blow-by gas is introduced into the gas inlet 110, the blow-by gas is stably distributed through the second unit surge part 104, and some reversed oil or condensate is By moving to the third unit surge part 106, distribution and movement can be stably implemented through the surge part 100.

The gas inlet 110 is disposed inclined downward from the second unit surge part 104 toward the third unit surge part 106. For example, the first inclination angle θ1 is a minimum of 8 degrees and a maximum of 10 degrees. is placed obliquely.

In this way, when the gas inlet 110 has the aforementioned first inclination angle θ1 and is inclined downwardly from the second unit surge part 104 toward the third unit surge part 106, the blow-by gas is Even in the case of reverse flow after being introduced into the gas inlet 110, the oil or condensate included in the blow-by gas is partially moved to the gas inlet 110, and then the reverse flow described later is caused by the slope of the inclined gas inlet 110. It can be moved to the prevention unit 200 .

In particular, in this embodiment, the gas inlet 110 is inclined at a first inclination angle, and condensate or oil can be induced to be drained through the backflow prevention unit 200, so that a large amount of condensate or oil is temporarily removed from the surge part 100. migration can be prevented.

The gas inlet 110 is formed in a tubular shape and maintains a cylindrical shape until a position where a backflow prevention unit 200 to be described later is installed based on a cross-sectional view, and an inner diameter gradually decreases past the backflow prevention unit 200. do.

The second unit surge part 104 according to this embodiment is viewed from the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 toward the outer upper part while looking at the gas inlet 110 A first extension part 104b that is inclined upward and branched, and a second extension part 104c that is horizontally branched from the extended end of the horizontal extension part 104a and extends to the backflow prevention part 200. ).

In the second unit surge part 104, the horizontal extension part 104a extends in the horizontal direction from the center of the surge part 100 to the length shown in the drawing, and at the right end of the horizontal extension part 104a based on the drawing, the above The first extension 104b and the second extension 104c are branched and extended.

A first through hole 104b1 is formed in the first extension part 104b, and a second through hole 104b2 is formed in the second extension part 104c.

The first through hole 104b1 is opened to move the blow-by gas to the first unit surge part 102, and the second through hole 104b2 is opened to the third unit surge part 106 to allow the blow-by gas to flow. By gas is formed to move.

The first through-hole 104b1 is opened obliquely upward toward the gas inlet 110 by the first extension part 104b, so that when oil or condensate flows backward, the first through-hole 104b2 flows toward the second through-hole 104b2. It may be induced to drain, or it may be induced to drain to the bottom surface of one side of the second through hole 104b2.

After the blow-by gas is introduced through the gas inlet 110, it moves to the first runner part 108a through the first through hole 104b1, and through the second through hole 104b2 into the second runner part ( 108b) can be easily moved.

In the second unit surge part 104 according to this embodiment, the third extension part 104d is formed together with the first and second extension parts 104b and 104c described above.

The third extension part 104d has a first round part 104d1 that is inclined downwardly and rounded to a predetermined length in the axial direction toward the third unit surge part 106 and inclined upwardly and extended in the circumferential direction, A first inclined portion 104d2 inclined upward toward the gas inlet 110 from an extended end of the first round portion 104d1 is included.

The third extension 104d is configured as described above to prevent movement to the outside of the surge part 100 as much as possible from a lower inner circumferential position when the blow-by gas flows backward into the gas inlet 110 .

In particular, the first inclined portion 104d2 does not extend horizontally but extends inclined upward toward the gas inlet 110, so that even when some oil or condensate flows backward, the reverse flow to the outside of the gas inlet 110 is minimized. It can be.

Since the first round part 104d1 does not extend horizontally but extends roundly toward the first inclined part 104d2 , resistance caused by the movement of the blow-by gas is minimized.

6 to 8, the backflow prevention unit 200 according to the present embodiment is located between the second extension 104c and the third extension 104d, and the second unit surge part ( 104), a groove portion 210 extending to a predetermined depth toward the third unit surge part 106, and a backflow prevention plate protruding from the third unit surge part 106 to be inserted into the groove portion 210 ( 220).

The reason why the backflow prevention unit 200 is located at the above position is that the flow of the blow-by gas through the gas inlet 110 is stably performed, while the movement to the outside of the gas inlet 110 is minimized when backflow occurs, and the drain hole 210a ) is to facilitate the movement of oil and condensate through.

The groove part 210 is formed to provide a space in which reversed condensate or oil is drained, and for example, extends in a horizontal direction to a first length L1 and extends in a vertical direction to a second length L2, It extends to a first depth dp1 in the depth direction, and the first length L1 extends relatively longer than the second length L2.

The reason why the first length L1 extends longer than the second length L2 in this way is that when condensate or oil is drained, the second extension 104c extends horizontally and condensate or This is because it is more advantageous to induce oil.

In addition, it is advantageous in terms of layout that the first length L1 extends longer than the second length L2 in view of the cross-sectional structure of the place where the backflow prevention unit 200 is located.

The groove part 210 is formed at a position facing the front surface of the backflow prevention plate 220 and the first wall part 212 formed at a position facing the rear surface of the backflow prevention plate 220, the first wall part The second wall portion 214 extending to a relatively lower height than (212) and formed at a position facing the side surface of the backflow prevention plate 220, connecting the first and second wall portions 212 and 214 A third wall portion 216 is included.

The second wall portion 214 is located at a position lower than the upper end of the backflow prevention plate 220. The reason for the low position is that the blow-by gas contacts the surface of the backflow prevention plate 220 while oil or condensate water is present. This is to move to the inside of the groove 210.

In addition, the second wall portion 214 is formed to stably guide the drain of oil and condensate without reducing the inner diameter of the air inlet 100 .

The first to third wall portions 212, 214 and 216 extend vertically, but may also extend at other angles.

A drain hole 210a opened toward the third unit surge part 106 is formed in the groove part 210 so that oil or condensate contained in the blow-by gas is drained to the third unit surge part 106. Oil or condensate flowing into the groove 210 may be stably drained.

The drain hole 210a communicates with the second runner part 108b formed in the third unit surge part 106 so that oil or condensed water can be drained stably.

The backflow prevention plate 220 according to the present embodiment is spaced apart from the inner front surface of the groove part 210 by a first distance d1 based on the opening width W of the groove part 210, and the groove part 210 ) is spaced apart from the inner rear surface by a second distance (d2), and is located in a state spaced apart from the side surface of the groove portion 210 by a third distance (d3).

The upper surface of the backflow prevention plate 220 extends upward to a position relatively higher than the first wall portion 212 . The reason why the backflow prevention plate 220 is extended in this way is to block a large amount of oil or condensate from moving at once when a backflow occurs toward the gas inlet 110 .

In addition, most of the oil or condensate flowed back by the backflow prevention plate 220 first moves to the inside of the groove 210 and then drains, and some of the oil or condensate that has not flowed in does not move to the outside of the gas inlet 110. and reverse flow is prevented by the aforementioned first inclined portion 104d2.

In the backflow prevention plate 220, first to third intervals d1, d2, and d3 are maintained in the groove portion 210, and the first interval d1 is relatively longer than the second interval d2. do.

The reason why the backflow prevention plate 220 is spaced apart is to move the backflow prevention plate 220 to the inside of the groove part 210 more stably by forming a space into which the backflow oil or condensate flows is larger than the second distance d2.

If the second interval d2 is formed larger than the first interval d1, oil or condensate is drained, but may be partially moved to the gas inlet 110 via the backflow prevention plate 220. Therefore, it is preferable to form as described above.

The backflow prevention plate 220 is positioned at a position L2/2 based on the second length L2 of the groove part 210 when viewed from above while being inserted into the groove part 210 . The position is located at the above position in consideration of the movement of oil or condensate flowing backwards in consideration of the movement of oil and condensate in the reverse direction B, which is opposite to the inflow direction A of the blow-by gas.

Referring to the attached FIG. 9 , in this embodiment, a drain inclined portion 106a inclined toward the drain hole 210a is formed in the third unit surge part 106 .

The drain inclined portion 106a is inclined toward the drain hole 210a so that oil or condensed water moves more quickly to the drain hole 210a. In this case, the oil or condensate may immediately move to the drain hole 210a without remaining in a pooled state on the inner surface of the groove 210 .

10 and 11, the backflow prevention plate 220 according to the present embodiment extends in the vertical direction from the opposite surface facing the first wall portion 212 and the second wall portion 214. A drain groove 224 is formed.

The drain groove 224 is formed to a predetermined depth, and a larger amount of condensed water and oil can be drained toward the inside of the groove portion 210 by increasing a contact area where oil and condensed water included in the blow-by gas come into contact. By doing so, the mobility to the drain hole 210a can be further improved.

In addition, when the blow-by gas flows backward, the movement to the gas inlet 110 is kept to a minimum, thereby minimizing problems caused by the reverse flow.

The backflow prevention plate 220 has a first backflow sloped portion 222, the upper surface of which is inclined downward toward the second wall portion 214, and the left and right sides of the upper surface are downwardly inclined toward the center and extended.

When the blow-by gas is moved in the inflow direction, the first reverse flow inclined portion 222 serves to guide the direction of movement to the space between the first and second extension portions 104b and 104b, and oil and condensate flow in the reverse flow direction. When it is moved, it can simultaneously serve to guide the draining direction in the second distance d2.

In this case, stability according to movement of the blow-by gas is improved, and even when a part of the blow-by gas flows backward in a reverse flow direction, it is possible to prevent a phenomenon from being moved to the gas inlet 110 .

The first backflow inclined portion 222 is formed on the upper surface of the backflow prevention plate 220 and is not formed in a flat shape but is formed inclined in a round shape to guide the movement direction when the blow-by gas moves in the inflow direction, Even when oil and condensed water move in the reverse flow direction, the probability of reverse flow into the gas inlet 110 can be minimized by allowing the oil and condensate to drain at the aforementioned second interval d2.

One embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Therefore, as long as these improvements and changes are obvious to those skilled in the art, they will fall within the scope of the present invention.

100: surge part
102, 104, 106: 1st, 2nd, 3rd unit surge part
104a: horizontal extension
104b: first extension
104b1, 104b2: first and second through holes
104c: second extension
104d: third extension
104d1, 104d2: 1st and 2nd round parts
106a: drain slope
108: runner part
110: gas inlet
200: backflow prevention unit
210: groove part
210a: drain hole
212, 214, 216: first, second, third wall parts
220: backflow prevention plate
222: first backflow ramp
224: second backflow ramp
d1, d2, d3: 1st, 2nd, 3rd interval

Claims (17)

a surge part 100 providing a space into which blow-by gas flows and having a gas inlet 110 inclined toward an outer upper part at a first inclination angle θ1; and
A backflow prevention unit 200 provided inside the gas inlet 110 to prevent the blow-by gas from flowing back into the gas inlet 110 after being introduced through the gas inlet 110. Intake manifold for vehicles. According to claim 1,
The serge part 100 includes a first unit serge part 102 having an outer shape with a predetermined size;
a second unit surge part 104 fused to a lower surface of the first unit surge part 102;
a third unit surge part 106 fused to a lower surface of the second unit surge part 104;
It includes a runner part 108 formed in a predetermined size inside the surge part 100 to provide a space into which the blow-by flows,
The gas inlet 110 is a vehicle intake manifold formed in the second unit surge part 104. According to claim 2,
The gas inlet 110 is disposed inclined downward from the second unit surge part 104 toward the third unit surge part 106. According to claim 2,
The second unit surge part 104 looks at the gas inlet 110 at the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 and is inclined upward toward the outer upper part, branching a first extension portion 104b;
A vehicle intake manifold including a second extension portion (104c) branched horizontally from an extended end of the horizontal extension portion (104a) and extending to the backflow preventing portion (200). According to claim 4,
The first extension part 104b includes a first through hole 104b1 opened to move the blow-by gas to the first unit surge part 102;
A vehicle intake manifold having a second through hole 104b2 opened to move the blow-by gas to the third unit surge part 106 in the second extension part 104c. According to claim 5,
The intake manifold for a vehicle, characterized in that the first through hole (104b1) is opened obliquely upward toward the gas inlet (110) by the first extension part (104b). According to claim 4,
The second unit surge part 104 includes a first round portion 104d1 extending toward the third unit surge part 106, inclined downward to a predetermined length in an axial direction and inclined upward in a circumferential direction;
A vehicle intake manifold further comprising a third extension portion 104d in which a first inclined portion 104d2 is inclined upward from an extended end of the first round portion 104d1 toward the gas inlet 110. According to claim 2,
The backflow preventing part 200 includes a groove part 210 extending from the second unit surge part 104 toward the third unit surge part 106 to a predetermined depth;
A vehicle intake manifold including a backflow prevention plate 220 protruding from the third unit surge part 106 to be inserted into the groove 210. According to claim 8,
The groove part 210 extends to a first length L1 in the horizontal direction, extends to a second length L2 in the vertical direction, and extends to a first depth dp1 in the depth direction,
The vehicle intake manifold, characterized in that the first length (L1) extends relatively longer than the second length (L2). According to claim 8,
The groove part 210 includes a first wall part 212 formed at a position facing the front surface of the backflow prevention plate 220;
a second wall portion 214 formed at a position facing the back surface of the backflow prevention plate 220 and extending to a relatively lower height than the first wall portion 212;
A vehicle intake manifold including a third wall portion 216 formed at a position facing a side surface of the backflow prevention plate 220 and connecting the first and second wall portions 212 and 214. According to claim 8,
In the groove part 210, a drain hole 210a opened toward the third unit surge part 106 so that oil or condensed water included in the blow-by gas is drained to the third unit surge part 106 is formed. manifold. According to claim 11,
A vehicle intake manifold having a drain inclined portion 106a inclined toward the drain hole 210a formed in the third unit surge part 106 . According to claim 8,
The backflow prevention plate 220 is spaced apart from the inner front surface of the groove part 210 by a first distance d1 based on the opening width W of the groove part 210, and the inner rear surface of the groove part 210. The intake manifold for a vehicle is spaced apart from the side of the groove part 210 by a second distance d2 and spaced apart from the side surface of the groove part 210 by a third distance d3. According to claim 13,
The vehicle intake manifold, characterized in that the first distance (d1) is spaced apart relatively longer than the second distance (d2). According to claim 10,
The backflow prevention plate 220 has an upper surface inclined downward toward the second wall portion 214 and has a first backflow inclined portion 222 formed therein. According to claim 10,
The upper left and right sides of the first reverse flow inclined portion 222 are downwardly inclined toward the center and extended. According to claim 10,
The backflow prevention plate 220 further includes a drain groove 224 extending in a vertical direction from a surface facing the first wall portion 212 and the second wall portion 214.

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